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    Characterization of Colletotrichum gloeosporioides, as the main causal agent of citrus anthracnose, and C. karstii as species preferentially associated with lemon twig dieback in Portugal

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    Authors
    Ramos, Ana Paula
    Talhinhas, Pedro
    Sreenivasaprasad, Surapareddy
    Oliveira, Helena
    Issue Date
    2016-09-13
    Subjects
    Citrus anthracnose
    Colletotrichum gloeosporioides
    Colletotrichum karstii
    Portugal
    Colletotrichum boninense species complex
    
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    Abstract
    In the last two decades significant losses in citrus production in Portugal related to anthracnose symptoms have been recorded. These symptoms were attributed to Colletotrichum gloeosporioides, but preliminary population diversity evidence suggested that other Colletotrichum species could be involved in the disease. In this work, a field survey of the main citrus growing areas in Portugal was conducted and the pathogenicity of a group of Colletotrichum spp. isolates was studied along with morphological and genetic variability characterization [including Inter-Simple Sequence Repeats (ISSR) profiles and DNA sequence data of rDNA-ITS and β-tubulin 2 gene regions]. Colletotrichum karstii (from the C. boninense species complex) and C. gloeosporioides were identified from symptoms on leaves, branches, flowers and fruits of several citrus cultivars. However, C. acutatum, the species most commonly associated with citrus anthracnose in the Americas, was never detected. While C. gloeosporioides was isolated at higher frequency overall (87 %), C. karstii was more frequent in branches and leaves of lemon in specific geographic locations. Only C. gloeosporioides was detected in flowers. Colletotrichum karstii and C. gloeosporioides were pathogenic to sweet orange flowers and fruits and to leaves of sweet orange, mandarin and lemon, while reference C. acutatum citrus isolates were pathogenic to Key lime flowers and leaves.
    Citation
    Ramos A, Talhinhas P, Sreenivasaprasad S, Oliveira H (2016) 'Characterization of Colletotrichum gloeosporioides, as the main causal agent of citrus anthracnose, and C. karstii as species preferentially associated with lemon twig dieback in Portugal', Phytoparasitica, 44 (4), pp.549-561.
    Publisher
    Springer Netherlands
    Journal
    Phytoparasitica
    URI
    http://hdl.handle.net/10547/624335
    DOI
    10.1007/s12600-016-0537-y
    Additional Links
    https://link.springer.com/article/10.1007/s12600-016-0537-y
    Type
    Article
    Language
    en
    ISSN
    0334-2123
    ae974a485f413a2113503eed53cd6c53
    10.1007/s12600-016-0537-y
    Scopus Count
    Collections
    Biomedical and biological science

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